I use this digital notebook to write down things I'm trying to learn to or things I currently know that I will likely forget. Most of the stuff I write is related to emacs, nixos, functional programming, DevOps, SRE and electronics.
I use a very hands-on/practical/visual approach in this notebook, so if that's your thing you might find the information useful!
This notebook is hosted on GitHub pages, so if you have any feedback you can open up a issue in the rzetterberg.github.io repo. Starting from 2017-09-29 I sign all commits on GitHub. Also, all tar files that contain code on this site is signed separately.